WATER HAMMER CUSHIONING METHOD AND ITS DEVICE

• Main Authors: YAMAMOTO KEIJI, YASUDA TOMOYUKI
• Format: Patent
• Language: English; Japanese
• Published: 07.09.2022
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; PIPES; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; WEAPONS

To provide a water hammer cushioning method for cushioning a water hammer which occurs at the pressure-sending of fluidized soil charged into an underground cave and a space, and backfilling them, and a fluid material such as thawed slurry being a raw material of the fluidized soil, and its device.SOLUTION: At the pressure-sending of a fluid material to pressure-sending piping which is laid in a prescribed conduit, the prescribed pressure-sending pressure of the fluid material is branched in a prescribed point of the pressure-sending piping, and accumulated, and the generation of negative pressure generated in the pressure-sending piping caused by the lowering of the pressure-sending pressure is prevented by discharging it into the pressure-sending piping in conjunction with the lowering of the pressure-sending pressure, thus cushioning a water hammer resulting from the negative pressure.SELECTED DRAWING: Figure 2 【課題】地下空洞や空間に充填して埋め戻すための流動化処理土や、その原料である解泥水等の流体材料を圧送する際に発生するウォーターハンマを緩衝するためのウォーターハンマの緩衝方法及びその装置を提供する。【解決手段】所定管路に敷設した圧送用配管への流体材料の圧送時において、流体材料の所定の圧送圧力を、圧送用配管の所定箇所において分岐して蓄圧するとともに、圧送圧力の低下に連動して圧送用配管内に放出することによって、圧送圧力の低下によって圧送用配管内に発生する負圧の発生を防止し、負圧に起因するウォーターハンマを緩衝する。【選択図】図２